Inquiring
Part of speech: verb
Definition: To ask (about something).
Example sentence: The danger to society is not merely that it should believe wrong things, though that is great enough; but that it should become credulous, and lose the habit of testing things and inquiring into them; for then it must sink back into savagery.
Questioning
Part of speech: noun
Definition: The action of asking questions; a survey; an inquiry.The act of challenging, wondering and doubting.
Part of speech: adjective
Definition: Characterized by questions, inquisitiveness, doubt or wonder.
Part of speech: verb
Definition: To ask questions about; to interrogate; to enquire for information.
Example sentence: What we observe is not nature itself, but nature exposed to our method of questioning.